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Title: On the Incidence of Wise Infrared Excess Among Solar Analog, Twin, and Sibling Stars

Abstract

This study presents a search for infrared (IR) excess in the 3.4, 4.6, 12, and 22 μ m bands in a sample of 216 targets, composed of solar sibling, twin, and analog stars observed by the Wide-field Infrared Survey Explorer ( WISE ) mission. In general, an IR excess suggests the existence of warm dust around a star. We detected 12 μ m and/or 22 μ m excesses at the 3 σ level of confidence in five solar analog stars, corresponding to a frequency of 4.1% of the entire sample of solar analogs analyzed, and in one out of 29 solar sibling candidates, confirming previous studies. The estimation of the dust properties shows that the sources with IR excesses possess circumstellar material with temperatures that, within the uncertainties, are similar to that of the material found in the asteroid belt in our solar system. No photospheric flux excess was identified at the W1 (3.4 μ m) and W2 (4.6 μ m) WISE bands, indicating that, in the majority of stars of the present sample, no detectable dust is generated. Interestingly, among the 60 solar twin stars analyzed in this work, no WISE photospheric flux excess was detected. However, a null-detectionmore » excess does not necessarily indicate the absence of dust around a star because different causes, including dynamic processes and instrument limitations, can mask its presence.« less

Authors:
; ; ; ;  [1];  [2];  [3]
  1. Departamento de Física Teórica e Experimental, Universidade Federal do Rio Grande do Norte, Campus Universitário, Natal, RN, 59072-970 (Brazil)
  2. European Southern Observatory, Karl-Schwarzschild-Str. 2, D-85748 Garching (Germany)
  3. Departamento de Física, Universidade Federal do Ceará, Caixa Postal 6030, Campus do Pici, 60455-900, Fortaleza, Ceará (Brazil)
Publication Date:
OSTI Identifier:
22661332
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 837; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTEROIDS; DETECTION; DUSTS; INFRARED SURVEYS; SOLAR SYSTEM; STARS

Citation Formats

Da Costa, A. D., Martins, B. L. Canto, Lima Jr, J. E., Silva, D. Freire da, Medeiros, J. R. De, Leão, I. C., and Freitas, D. B. de, E-mail: dgerson@fisica.ufrn.br. On the Incidence of Wise Infrared Excess Among Solar Analog, Twin, and Sibling Stars. United States: N. p., 2017. Web. doi:10.3847/1538-4357/837/1/15.
Da Costa, A. D., Martins, B. L. Canto, Lima Jr, J. E., Silva, D. Freire da, Medeiros, J. R. De, Leão, I. C., & Freitas, D. B. de, E-mail: dgerson@fisica.ufrn.br. On the Incidence of Wise Infrared Excess Among Solar Analog, Twin, and Sibling Stars. United States. doi:10.3847/1538-4357/837/1/15.
Da Costa, A. D., Martins, B. L. Canto, Lima Jr, J. E., Silva, D. Freire da, Medeiros, J. R. De, Leão, I. C., and Freitas, D. B. de, E-mail: dgerson@fisica.ufrn.br. Wed . "On the Incidence of Wise Infrared Excess Among Solar Analog, Twin, and Sibling Stars". United States. doi:10.3847/1538-4357/837/1/15.
@article{osti_22661332,
title = {On the Incidence of Wise Infrared Excess Among Solar Analog, Twin, and Sibling Stars},
author = {Da Costa, A. D. and Martins, B. L. Canto and Lima Jr, J. E. and Silva, D. Freire da and Medeiros, J. R. De and Leão, I. C. and Freitas, D. B. de, E-mail: dgerson@fisica.ufrn.br},
abstractNote = {This study presents a search for infrared (IR) excess in the 3.4, 4.6, 12, and 22 μ m bands in a sample of 216 targets, composed of solar sibling, twin, and analog stars observed by the Wide-field Infrared Survey Explorer ( WISE ) mission. In general, an IR excess suggests the existence of warm dust around a star. We detected 12 μ m and/or 22 μ m excesses at the 3 σ level of confidence in five solar analog stars, corresponding to a frequency of 4.1% of the entire sample of solar analogs analyzed, and in one out of 29 solar sibling candidates, confirming previous studies. The estimation of the dust properties shows that the sources with IR excesses possess circumstellar material with temperatures that, within the uncertainties, are similar to that of the material found in the asteroid belt in our solar system. No photospheric flux excess was identified at the W1 (3.4 μ m) and W2 (4.6 μ m) WISE bands, indicating that, in the majority of stars of the present sample, no detectable dust is generated. Interestingly, among the 60 solar twin stars analyzed in this work, no WISE photospheric flux excess was detected. However, a null-detection excess does not necessarily indicate the absence of dust around a star because different causes, including dynamic processes and instrument limitations, can mask its presence.},
doi = {10.3847/1538-4357/837/1/15},
journal = {Astrophysical Journal},
number = 1,
volume = 837,
place = {United States},
year = {Wed Mar 01 00:00:00 EST 2017},
month = {Wed Mar 01 00:00:00 EST 2017}
}